想在windows下使用命令來查找文件，可以使用如下命令：where
命令的格式如下：

WHERE [/R dir] [/Q] [/F] [/T] pattern...

Description:
??? Displays the location of files that match the search pattern.
??? By default, the search is done along the current directory and
??? in the paths specified by the PATH environment variable.

Parameter List:
??? /R?????? Recursively searches and displays the files that match the
???????????? given pattern starting from the specified directory.

??? /Q?????? Returns only the exit code, without displaying the list
???????????? of matched files. (quite mode)

??? /F?????? Displays the matched filename in double quotes.

??? /T?????? Displays the file size, last modified date and time for all
???????????? matched files.

??? pattern? Specifies the search pattern for the files to match.
???????????? Wildcards * and ? can be used in the pattern. The
???????????? "$env:pattern" and "path:pattern" formats can also be
???????????? specified, where "env" is an environment variable and
???????????? the search is done in the specified paths of the "env"
???????????? environment variable. These formats should not be used
???????????? with /R. The search is also done by appending the
???????????? extensions of the PATHEXT variable to the pattern.

???? /?????? Displays this help message.

? NOTE: The tool returns an error level of 0 if the search is
??????? successful, of 1 if the search is unsuccessful and
??????? of 2 for failures or errors.

Examples:
??? WHERE /?
??? WHERE myfilename1 myfile????.*
??? WHERE $windir:*.*
??? WHERE /R c:\windows *.exe *.dll *.bat?
??? WHERE /Q ??.???
??? WHERE "c:\windows;c:\windows\system32:*.dll"
??? WHERE /F /T *.dll

我們想查找文件內容的命令是：find或者findstr
在linux下的查找文件的命令也是 :? where
也可以使用find -name
查找文件的內容的話，可以使用grep ,支持正則表達式，使用起來也很方便，再加上管道，有的時候會覺得特別的方便和快捷。


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